4 RESEARCH IN CHINA. 



equal age proven. He further states that the age of the rocks containing 

 Dorypyge richthofcni, from Wu-lo-pu, is probably the same as that of the 

 Quebec group, basing this upon comparisons with species from Utah, which 

 he referred to the genus Dorypyge [China, Richthofen, vol. iv, pp. 31-33]. 



The collections made by the Carnegie Institution of Washington Expedi- 

 tion prove that Dorypyge richthofeni occurs in the central and upper portion 

 of the Ch'ang-hia formation and is of Middle Cambrian age. Baron von Rich- 

 thofen 's means of comparison were with the fauna referred to the Quebec group 

 which was at that time supposed to be of Lower Silurian (Ordovician) age. 



Dr. C. Gottsche, in 1886, called attention to the presence of Cambrian 

 rocks and fossils in northwestern Korea, south of Wi-won. He published a 

 geological section and identified Anomocare ploiiiini Dames, Anomocare majus 

 Dames, Dorypyge richthofeni Dames, and Lingnlella cf. nathorsti Linnarsson. 

 He also mentions the genera Theai, Ort/iis, Lingulclla (two species), Agnostus, 

 Conocephalites, Crepicephalus, and ?Remopleurides, and correlates the forma- 

 tion with that of the " Andrarum limestone" of Scandinavia [Gottsche, 1886, 

 pp. 865-867]. 



In 1899 M. Bergeron [pp. 499-516] described the following Cambrian 

 fossils from shaly limestones collected in the province of Shan-tung, China: 



Agnostus doui'illei Drcpanura premesnili Dicellocephalus ? sinensis 



Olenoides leblanci Arthricocephalus chauvcaui Calymmene ? sinensis 



Of the above we have identified the following from the Ku-shan shale of 

 the section made by Mr. Blackwelder: 



Agnostus doumllei Dicellocephalus ? sinensis = Stephanocare 



Olenoides leblanci Calymmene ? sinensis = Blackwelderia 



Drepanura premesnili 



From the Cambrian formations of Siberia, Dr. Fr. Schmidt [1886, pp. 

 407-424] described the following fossils: 



Agnostus czekanowskii Liostracus ? maydeli = Anomocarella 



Proetus (Phaeton) slatkowskii = Dorypyge Anomocare pawlowskii= Anomocarella 



Cyphaspis sibirica =Solenopleura 



This fauna was subsequently reviewed by Eduard von Toll [1899, pp. 

 21-57], wno added the following: 



Confervites primordialis Bornemann Coscinocyathus iiesica Bornemann 



Archfeocyathus acutus Bornemann Coscinocyathus cf. cancellatus Bornemann 



Archceocyathus aduncus Bornemann Spirocyathus sp. undt. 



Archceocyathus ijizkii von Toll Rhabdocyathus stbiricus von Toll 



Arclmocyathus patulus Bornemann Prolopharelra sp. undt. 



Archceocyalhus proskurjakowi von Toll Helminthoidichnites sp. 



Archceocyathus stbiricus von Toll Kutorgina cingulata Billings 



Coscinocyathus calathus Bornemann ? Obolella chromatica Billings 



Coscinocyathus campanula Bornemann Hyolithes sp. undt. 



Coscinocyathus corbicula Bornemann Microdiscus kochi von Toll 



Coscinocyathus dianthus Bornemann Microdiscus lenaicus von Toll 



Coscinocyathus elongalus Bornemann Microdiscus sp. undt. 



Coscinocyathus irrcgularis von Toll Agnostus schmidti von Toll 



